Picture-frame clamp



March 12, 1929. J. H- HARR|$0N PICTURE FRAME CLAMP Filed April 29, 1927 IN'VENTOR cf. HHazTLson w A BY ATTORNEY Patented Mar. 1 2, 1929.

UNlTlszD STAg ss rarer OFFICE.

JOHN H. HARRISON, 0F STOCKTON, CALIFORNIA'.

PIGTUREFRAME CLAMP.

Ap'piieation'med Api-n 29,- 1927L semina. 187,464.

This invention relates to clamps used yin connection with the cutting and connecting together of frames.

M principal object is to provide a device for the purpose so arranged that while the adjacent members of the frame may be rigidly held at right angles to each other they may be also movedtoward each other Ain a plane at.'

right angles tothe line of cut or the plane of contact Yof the frame members. f Thisenables the corners when glued to be 4pressed into firm engagement with each other, insuring a tight joint and avoiding the possibility of the frame members movin.

alinement relative to each other.l

' f The device is also so arrangedV that when the frame members have been c ut and properly matched together, one ofthe clamping members with the corresponding section of frame may be removed in order to allow the glue to Vbe conveniently applied tothe frame l' corner. Said clamping member may then be replaced in connection with thciother *clamping member and the corners then brought together for the above stated purposeV ence indicate corersponding parts in the several views@ ig. 1 is a' top plan view of my improved clamp.V v i -Fig 2 isa side elevation ofthe same partly broken out.

`Fig. 3 is al fragmentary cross section on the line3-3 of'Fig-1Q'v 'l Referring now more particularly to the characters of reference on'tlie drawings, 1 and 2 denote transversely spaced and horizontal sleevesconnected by a web 3. Aishaft 4 prothereof and is rigidly secured thereto. able in and projecting through ythe sleeve 2-is another shaft 5 parallel' to thesh'aft4. The shaft isheldfrom turning in said sleeve by a slot and pin arrangement asshown,or other- Vwise as may be foundusnitable. v`Rernovably the bevel corners of picture o out of their proper slidable on the slia'fts'ftand 5 are sleeves 6 and v7 respectively connectedlby a web` 8. The

shaft outwardly of vthe sleeve 7 is provided with a circumferential groove or recess 9 to receive an arch shaped catch member 10 which is pivotedjonto the sleeve7 at its outer end,

yand on which a suitable spring 10a bears to normallyhold the catch engaged with the recess. The shaft 5 at the end opposite the sleeve 7 is threaded as at 5aA and isengaged by 'a handynut 11 whichbears against'the outer end -of the "sleeve 2 o r that end opposite'the' sleeve 7. 1 It will therefore be seen that if the catch 10 is engaged with the shaft 5 and the nut 11 is' advanced, said shaft and the sleevesv 6 and 7 l will beV advanced toward the ksleeves 1 and 2.

two sets of sleeves are individuallframe clamps. Each clamp comprises a horizontal base plate 12 having an upstandingstopflange n Projecting upwardly from thewebs ofthe "Y:

13 across its inner end. Theseflanges aredisv pose'daty 90 degrees to each other and at 45 degrees to the axis ofthe sha-ft at their adj acent ends. Slidable on each plate v 12 is an adjustableupstanding flange 14, forming a movwhich is the fixed jaw. The flange 14 is moved to, and from the flange 13 at will by means of a hand screw 15 turnably mounted in connection with the plate 12 belowthevupper sur-face thereof and havingthreaded.engagement witha lug 16 depending from the rflange 13. 'l'he'platev has a longitudinal slot 17 ablej aw and disposed parallel tothefiange 18 l web 3 a sufficient distancebelow the same to In operation vthe framel members 19 are mounted in the clamping units Vandare clamped in place thereon 'between the jaws 13 The bevel corners 2O of theframe mem@ bers may be cut before beingl placed in the clamps, but the devicevis'preferably mounted `Viri'ccninection with a mitre saw .whose blade jects outwardly from the sleeve 1 at onev end @Hable thecdeviceto be firmly' held in a vise.. A Y

and 14 bysuitablc manipulationof the screws' is disposed in'. a. plane at degrees between the clamping flanges or at 90 degrees to the able onrthe shaft 4 maybe removed by throwing baclrthecatch 10 so as to allowt e sleeve tothe slid ifthe shaft witliut disturbing vand another shaft parallel to said first named Shaft; said last named shaft being secured to one of the units and slidable on the other.

9. A picture-frame clamp including a pair .Y

of Clamping units, disposed at .an angle to 10 each other, each unit having a pair of parallel clamping surfaces, and means supporting sald'umts and enabling them to be moved to andfron'i each other; one of the umts being removable from the supporting means.

10. A structure as 1n ola1m'9, with releasV able means normally preventing such re-v moval of the unit. l `In testimony lwhereof I aiix my signature.

Jol-IN H. HARRISON. 

